package com.atguigu.springcloud.controller;

import com.atguigu.springcloud.entities.CommResult;
import com.atguigu.springcloud.entities.Payment;
import com.atguigu.springcloud.lb.LoadBalancer;

import lombok.extern.slf4j.Slf4j;
import org.springframework.cloud.client.ServiceInstance;
import org.springframework.cloud.client.discovery.DiscoveryClient;
import org.springframework.http.ResponseEntity;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.client.RestTemplate;

import javax.annotation.Resource;
import java.net.URI;
import java.util.List;

@RestController
@Slf4j
public class OrderController {
//    public static final  String PAYMENT_URL="http://localhost:8001";
  public static final String PAYMENT_URL ="http://CLOUD-PAYMENT-SERVICE";
    @Resource
    private RestTemplate restTemplate;

    @Resource
    private LoadBalancer loadBalancer;

    @Resource
    private DiscoveryClient discoveryClient;          //可以获取服务的详细信息


    @GetMapping("/consumer/payment/create")
    public CommResult<Payment> create(Payment payment){
        return  restTemplate.postForObject(PAYMENT_URL+"/payment/create",payment,CommResult.class);
    }

    @GetMapping("/consumer/payment/get/{id}")
    public CommResult<Payment> getPayment(@PathVariable("id")  Long id){
        return  restTemplate.getForObject(PAYMENT_URL+"/payment/get/"+id,CommResult.class);
    }


    @GetMapping("/consumer/payment/getForEntity/{id}")
    public CommResult<Payment> getPayment2(@PathVariable("id") Long id)
    {
        ResponseEntity<CommResult> entity = restTemplate.getForEntity(PAYMENT_URL+"/payment/get/"+id,CommResult.class);

        if(entity.getStatusCode().is2xxSuccessful()){
            //entity 更详细
            return entity.getBody();
        }else{
            return new CommResult<>(444,"操作失败");
        }
    }

    @GetMapping(value = "/consumer/payment/lb")
        public String getPaymentLB(){
            List<ServiceInstance> instances =discoveryClient.getInstances("CLOUD-PAYMENT-SERVICE");

            if (instances==null || instances.size()<=0){
                return null;
            }

            ServiceInstance serviceInstance = loadBalancer.instances(instances);
        URI uri = serviceInstance.getUri();
        return  restTemplate.getForObject(uri+"/payment/lb",String.class);

    }
}
